F22B21/00 - CPC Classification Index

ClassID:

155504 ⎘

F22B21/00 - CPC Classification

Classification description:

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically

Sub-classes:

F22B21/002 » {involving a single upper drum } 8
F22B21/005 » {involving a central vertical drum, header or downcomer} 2
F22B21/007 » {specially adapted for locomotives} 0
F22B21/02 » built-up from substantially straight water tubes 24
F22B21/22 » built-up from water tubes of form other than straight or substantially straight 4
F22B21/34 » built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers 15
F22B21/40 » built-up from water tubes arranged in a comparatively long vertical shaft, i.e. tower boilers 6

Recent Application in this class:

20240159172

2024-05-16

ONCE-THROUGH HEAT EXCHANGER AND HEAT RECOVERY STEAM GENERATOR INCLUDING THE SAME

20190170344

2019-06-06

Vertical heat recovery steam generator

20190078773

2019-03-14

Arrangement of heat recovery surfaces of a recovery boiler

20170298820

2017-10-19

Heat recovery unit and power plant

20170234529

2017-08-17

Method and apparatus for improved firing of biomass and other solid fuels for steam production and gasification

20160245127

2016-08-25

Heat exchanging system and method for a heat recovery steam generator

20160109116

2016-04-21

Method and apparatus for improved firing of biomass and other solid fuels for steam production and gasification

20140360442

2014-12-11

WATER SUPPLY TUBE FOR STEAM GENERATOR

20130276723

2013-10-24

Method and apparatus for improved firing of biomass and other solid fuels for steam production and gasification

#10

20130101949

2013-04-25

Method for generating a stress reduction in erected tube walls of a steam generator

#11

20120291720

2012-11-22

ONCE-THROUGH STEAM GENERATOR FOR USING AT STEAM TEMPERATURES OF ABOVE 650°C

#12

20120272929

2012-11-01

ONCE-THROUGH STEAM GENERATOR FOR BURNING DRY BROWN COAL

#13

20120137938

2012-06-07

Pulverized coal boiler

#14

20110162594

2011-07-07

Waste heat steam generator

#15

20110107948

2011-05-12

Biomass-mixed-firing pulverized coal fired boiler and operation method of the boiler

#16

20110094455

2011-04-28

Buckstay connecting system

#17

20100279239

2010-11-04

BOILER STRUCTURE

#18

20100059216

2010-03-11

Heat exchanger in a modular construction

#19

20090120379

2009-05-14

Boiler having an integrated oxygen producing device

#20

20080276844

2008-11-13

Coal boiler and coal boiler combustion method

#21

20070175413

2007-08-02

Suspended steam boiler